title: The correlation of corneal refractive power, axial length, and the refractive power of the emmetropizing intraocular lens in cataractous eyes.
abstract: Ultrasound biometry was done for 400 cases of cataract. The posterior-chamber lens power was found to be 18.2 +/- 4.26 D; the corneal refractive power, 43.78 +/- 1.86 D; and the axial length of the globe, 23.57 +/- 1.57 mm. The correlation between the refractive power of the cornea and the axial length shows the following physiological mechanism: (1) in hypermetropia an increase in corneal refractive power occurs in parallel with an increase in axial length; (b) in myopia an increase in axial length is compensated by a decrease in corneal refractive power, with both of the aforementioned conditions aiming at achieving emmetropia; and (c) patients with axial myopia either react in the form of condition b (state of compensation) or show an increase in corneal refractive power in association with an increase in axial length (state of decompensation).
authors.affiliation: Amman Surgical Hospital, Jabal Amman, and Faculty of Medicine, University of Jordan, Jordan.
authors.forename: F N
authors.initials: FN
authors.lastname: Sayegh
mesh_terms: D001699:Biometry; D002386:Cataract / Q000503:physiopathology*; D002387:Cataract Extraction; D003315:Cornea / Q000502:physiology*; D005123:Eye / Q000033:anatomy & histology*; D005260:Female; D006801:Humans; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D012029:Refraction, Ocular / Q000502:physiology*; D012030:Refractive Errors / Q000503:physiopathology*